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(No Model.)

J. 13., ADT. APPARATUS FOR SEPARATING STE-MS AND DUST FROM GRANULATED TOBACCO.

No. 288,911. A Patented Nov. 20, 1883.

INVEINT UR n4 PETERS, Fhalvuthagnpflel. Washinmcn. n c

UNITED STATES PATENT OFFICE.

JOHN B. ADT, OF BALTIMORE, MARYLAND.

APPARATUS FOR SEPARATING STEMS AND DUST FROM GRANULATED TOBACCO.

SPECIFICATION forming part of Letters Patent No. 288,911, dated November 20, 1883.

' Application filed June 25, 1883. (No model.)

To all whom it may concern:

Be it known that I, JOHN B. ADT, of the city of Baltimore, and State of Maryland, have invented certain new and useful Improvements in Apparatus for Separating Stems and Dust from Granulated Tobacco, of which the following is a specification.

This invention relates to a machine to be used in connectionwith aleatgranulating machine, or one in which leaf-tobacco is out into small pieces for smoking purposes, whereby stems and dust are separated from the granulated tobacco and deposited in different receptacles.

In the accompanying drawings, forming a part hereof, Figures I and II are partly sectional views of the apparatus as seen from different points, Fig. III, a sectional plan of same, taken on the dotted line as as, Fig. I.

The same letters of reference indicate the same or similar parts in all the views.

A is the sieve of the granulating-machine, which machine, as it forms no part of the present invention, is not shown or described herein. The sieve A discharges the granulated tobacco, which at this time consists of leaf, stems, and a certain proportion of dust, to a receiving-hopper, B, having an outletchannel, 0. l I

D is a fan or air exhausting and forcing device, the suction-pipe a of which is connected to the channel 6 at a point below the bottom of the receiving-hopper B. The dischargepipe I) of the suction-fan is connected with a box, IE, beneath a diagonally-placed sieve, c, which divides the said box into the leaf and dust chambers, respectively, denoted by d and e.

Supposing the apparatus to bein operation, the granulated tobacco entering the receivinghopper B falls toward the bottom of the chan nel C, and as air is supplied to the fan through the aperture f it passes through the channel 0 to the suction-pipe a of the fan, and thence to the box IE, carrying with it the leaf and dust without the stems, which, being heavier, fall to the bottom of the channel C, andthence to any receptacle placed underneath thereof.

By referring to Fig. I it will be seen that air delivered through the pipe 11 passes through the sieve c, and finally to the outer air through a second sieve, g, which is of finer mesh than the one 0. As the leaf and dust are delivered to the chamber 01 of the box E they are thrown against the sieve c, which allows the passage through it of the dust, but prevents the es cape of the leaf, which falls through the outletpipe h to any suitable receptacle, freed from all dust, which is retained in the chamber 0, as it cannot pass through the sieve g.

In the operation of the machine as described it will be understood that the granulated tobacco, consisting of leaf, stems, and dust, introduced to the receiving-hopper B is separated from the stems in the channel 0 and then passes to the chamber (1, where it is separated from the dust, which latter is withdrawn from the chamber 6 through the chute 2'. (Shown only in Fig. II.)

I claim as my invention In a machine for separating stems and dust from granulated tobacco, the combination of the hopper B, the outlet-channel 0, having the air-aperture f, box 6, provided with sieves 0 and g, and outletpipe h, and the fan D, having suitable pipes, whereby air is drawn from the outlet-channel C and delivered below the sieves in the box 6, substantially asispecified.

' JOHN B. ADT.

I-Vitnesses:

EDW. J. DIGGS, DANL. FISHER. 

